From: Hugh Dickins <hugh@veritas.com>
To: Wayne Whitney <whitney@math.berkeley.edu>
Cc: Mark Hahn <hahn@coffee.psychology.mcmaster.ca>,
majer@endeca.com, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: memory allocation problems
Date: Fri, 6 Apr 2001 22:21:14 +0100 (BST) [thread overview]
Message-ID: <Pine.LNX.4.21.0104062211470.1572-100000@localhost.localdomain> (raw)
In-Reply-To: <Pine.LNX.4.30.0104061227240.25381-100000@mf1.private>
On Fri, 6 Apr 2001, Wayne Whitney wrote:
>
> As was pointed out to me in January, another solution for i386 would be to
> fix a maximum stack size and have the mmap() allocations grow downward
> from the "top" of the stack (3GB - max stack size). I'm not sure why that
> is not currently done.
I'd be interested in the answer to that too. Typically, the memory
layout has ELF text at the lowest address, starting at 0x08048000 -
which is a curious place to put it, until you realize that if you
place the stack below it, you can use (in a typical small program)
just one page table for stack + text + data (then another for mmaps
and shared libs from 3GB down): two page tables instead of present three.
Hugh
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next parent reply other threads:[~2001-04-06 21:21 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.30.0104061227240.25381-100000@mf1.private>
2001-04-06 21:21 ` Hugh Dickins [this message]
2001-04-05 17:08 majer
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